beings can use to create sounds. >> now, that was great. so this really is fourier analysis in action, right? >> i would love to be able to do that for a doughnut shape, to be able to control exactly what sounds i'm hearing. it's wonderful to see someone who can actually produce the sounds, the frequencies, and the waveforms at the same time. >> he really feels like he's really manipulating sines and cosines. >> that's great that you could give him a waveform and he can come up with a sound that fits that wave form; it's just wild. >> so this discussion that we've been having is starting to resonate with me, for lack of a better word, and resonating back to what we talked about originally with the greeks. so the greeks had this mystical feeling. i mean, mystical as well as sort of, you know, sensory, that strings that were of commensurate length would sound nice together if you plucked them, okay, that they'd be harmonious. and in fact, we sort of see that mathematically, they were sort of right with this work, right? >> those frequencies a